<?php
/**     
  *
  * Copyright (c) 2009, Persistent Systems Limited
  *
  * Redistribution and use, with or without modification, are permitted 
  *  provided that the following  conditions are met:
  *   - Redistributions of source code must retain the above copyright notice, 
  *     this list of conditions and the following disclaimer.
  *   - Neither the name of Persistent Systems Limited nor the names of its contributors 
  *     may be used to endorse or promote products derived from this software 
  *     without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
  
/**
  *
  * This file contains the definition of Guid Class
  */
/**
  * The Guid Class.
  * 
  * Used to generate GUID
  */
class Guid
{
    /**
     * @Return <Guid>
     * Generate a unique id using MD% algorithm
     */
    public static function NewGuid()
    {
        $rawId = strtolower(md5(uniqid(rand(), true)));
        return substr($rawId, 0, 8).'-'
                        .substr($rawId, 8, 4).'-'
                        .substr($rawId,12, 4).'-'
                        .substr($rawId,16, 4).'-'
                        .substr($rawId,20,12);		
    }
};
?>